Aceria brachytarsus (Keifer, 1939)

walnut pouch gall mite

on Juglans

Juglans regia, Hungary, Mosonmagyaróvár, 14.v.2018 © László Érsek

same leaf, underside

gallen

gall

gal

section

Juglans regia, Belgium, prov. Limbourg, Maasmechelen, Maesbeempder Greend, 20.viii.2019 © Carina Van Steenwinkel

detail

two galls at the underside of the leaf

vertical section through a gall

Juglans regia, France, dép. Paris, Rosny-sous-Bois, 20.x.2021 ©
Axel Dehalleux: another demonstration of the expansion of the species

gall

The galls resemble those of Aceria tristriata, but they are higher, distinctly conical.

host plants

Juglandaceae, monophagous

Juglans nigra, regia.

synonyms

Aceria brachytarsa; Eriophyes brachytarsus.

notes

The species has been described from California; elsewhere reported from Iran (Xue ao). A picture by Manuel Alvarado on the Spanish website Biodiversidad Virtual in the Sierra Nevada in august 2011 might be the first sign of this species in Europe.

references

Keifer (1952a), Keifer, Baker, Kono ao (1982a), Ripka, Bodor & Érsek (2018a), Xue, Sadeghi & Hong (2009a).